[Skiboot] [PATCH] abort if device tree parsing fails

[Stewart Smith]

Anton Blanchard <anton at samba.org> writes:
> I debugged a checkstop with a BML boot which turned out to be device
> tree issues. A corrupt device tree is very likely to result in a
> later checkstop, so abort in dt_expand to make debugging much easier.

thanks, applied!

I also added attribute((warn_unused_result)) and am proceeding to
sprinkle that around the place.